GPT 5.6 models not supported due to invalid temperature value

[DanielLaberge]

Server

• Cloud (https://app.khoj.dev)
• Self-Hosted Docker
• Self-Hosted Python package
• Self-Hosted source code

Clients

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OS

• Windows
• macOS
• Linux
• Android
• iOS

Khoj version

1.42.10

Describe the bug

GPT 5.6 models require temperature to be set to 1.0, and Khoj sets it at 0.8.

Current Behavior

BadRequestError: Error code: 400 -
{'error': {'message': "Unsupported
value: 'temperature' does not support
0.8 with this model. Only the default
(1) value is supported.", 'type':
'invalid_request_error', 'param':
'temperature', 'code':
'unsupported_value'}}

Expected Behavior

.

Reproduction Steps

Try using any GPT 5.6 models, like gpt-5.6-luna

Possible Workaround

No response

Additional Information

No response

Link to Discord or Github discussion

No response

[mohar-xe]

Hey @DanielLaberge, Are you planning to put up a fix for this? If not, I can take it on.

I traced the code path and the root cause is that GPT-5.6 rejects any temperature parameter, but Khoj always passes it. There are two failing flows:

On the official API, is_openai_reasoning_model() matches gpt-5 and sets temperature = 1, but still sends it, causing the 400.
On third-party APIs, that same function returns False (because it checks is_openai_api()), so it defaults to temperature = 0.6, which also causes a 400.

I'd propose we just use the existing "pop instead of set" pattern khoj have for Grok models. I'd add an is_gpt5_model() helper to catch the gpt-5 prefix on any host, route temperature through model_kwargs in all 4 utils.py helpers, and pop it if it's GPT-5.

This keeps the tracer intact and leaves default temps alone for other models. Let me know if I should go ahead and PR this, Thanks

[DanielLaberge]

No, you're welcome to go ahead. Cheers.